Tip 1: Make sure to replace your mascara regularly. Mascara that is old will begin to dry and can easily clump on the lashes. Besides wanting to avoid clumps, you should throw out your mascara every three to four months (Depending on how much you use it) to lessen your chances of getting an eye infection. If you are an everyday user of mascara, it’s best to discard it after three months. Each time you open your mascara tube, you let air in on the formula which will dry out the formula quicker. So if you have old mascara sitting around, throw those out and start fresh!